Comment by troupo

Does it? Instead of a single parameter you now have two names, and a type info to boot

    pub fn replace(
      in string: String,
      each pattern: String,
      with replacement: String,
    ) {
      // The variables `string`, `pattern`, and `replacement` are in scope here
    }

    replace(in: "A,B,C", each: ",", with: " ")

vs

    pub fn replace(
      in: String,
      each: String,
      with: String,
    ) {

    }

    replace(in: "A,B,C", each: ",", with: " ")